diff --git a/src/validation_workflow/api_test_cases.py b/src/validation_workflow/api_test_cases.py
index 1d2f5ce70c..3a689b24ee 100644
--- a/src/validation_workflow/api_test_cases.py
+++ b/src/validation_workflow/api_test_cases.py
@@ -28,7 +28,7 @@ def test_cases(self, projects: list) -> Any:
         test_cases = [
             ['https://localhost:9200/', 200, ''],
             ['https://localhost:9200/_cat/plugins?v', 200, ''],
-            ['https://localhost:9200/_cat/health?v', 200, ['green', 'yellow'],
+            ['https://localhost:9200/_cat/health?v', 200, ['green', 'yellow']],
         ]
         if ("opensearch-dashboards" in projects):
             test_cases.append(['http://localhost:5601/api/status', 200, ''])